To carrying out the basic operation of spinning, Opening is needed. The raw materials enter the spinning mill in highly pressed from to enable optimum transport and storage condition to be used. Thus Opening must precede the basic operation.
Opening is two types. They are:
1.      Opening to flocks. (In the blow room).
2.      Opening to fiber (In the carding machine).
There is the intensity of opening or factors conditioned for opening:
1.      Raw materials.
2.      Machines or devices.
3.      Speed.
4.      Ambient condition.
5.      Position of the machine.